Pressure control and exhaust valve for fluid-pressure-operated railway dump cars



'Oct 7, 1930. J, P, ANDERSQN 1,777,821

PRESSURE CONTROL AND EXHAUST VALVE FOR FLUID PRESSURE OPERATED RAILWAY DUMP cARs Filed NOV. 23, 1927 I me' l l y IN-VENTOR "fr i Painied oet; .17, 193eY JOHNJP; ANDERSON, or NOPPEL, PENNSYLVANIA, YAssrciNoE, YLEY; MiisNiifrissniN- ENTsgTo rREssEnsTEEL GAR COMPANY, 0E lri'rrsiaunen,srENNsYLvANIA, A

coRPoEATI'oN 0E NEW JERSEY PRESSNEE yCN'LROI-l NgD ExHAus'r "VALVE"Eon`ELuinrEEssnEE-OPEEATEEIEnit-1,

n Y f WAYgfnUiviPcARs f i v invention relates topressure operated."

l carhavingbodytilting cylinders; ajpressure j which lilaybe connected, vat its ends to 'simi-f f matiealjly-` :eihaust the pressure from said f i mechanismafterthebodyhas been dumped.

. i Referring to the drawing, the iigure is` al Vsection throughthe Valve and exhaust cham seinNo; 244,877, sied Jarige, i928. Y

reseryoirland an AoperatingY pressure `line lar fears "toformfatrain of suchV` dump cars. 5 A car embodying Such a pressure operating system` lis fully described v,in fan application aie'dfbyme jointijywah 'Aurea o. schmqiii "Angobject of my invention is tolprovide al pressure operated railway dump ca rwith a pressureA operated, yalveor supplying pressure from the `pressure reservoir tog operate tliecarbody tilting mechanisniand to autober with required pressure connections to the` reservoir and to: thebodytilting cylinders.

`Referencecharacter 1 indicates the Valve casing having la member 2 attached thereto.

Within the casing-isa Huid pressure `distribution chamber, anfoperating chamber 4T 1 and a* diferential piston chamber 171con-` necting the operating and distribution chami 3 i f bers.

The distribution chamber. comprises a. receiving` chamber 8,` a discharging chamu ber9 and Va port connecting the chambers. i u A` diierential piston in said piston chamber 1 has the smaller vhead 18 adjacent the'chamber *9 andthe larger head 19` adjacent the chamber 4.` AValve stem4 5 rising out of the piston'Y head 18 has mount/ed thereon a valve 'which is normally `seated in thepport between the chambers'S and 9.` A springmember 11 betweenfthevalve and casing 1 insures seating of the valve 6.v Within the member 2`is a piston chamber 321 opening i 1 `into the chamber 4 ofthe casing and an eX` haustchamber 22. A piston 2OV in the cham' `ber21 has attachedthereto a Valve stem 12 upon which is mounted va fvalve 23 which is `seated in the exhaustchamberLfPorts in the exhaust chamber are connected with openings 13 and 14 of themember 2 and the Valve 22 is `normally free of said ports.` Encircling the valve'stem is a spring 24 which resists flowing e ,rservoir movement of the piston 2,0l and insures the j movement of `the pistonwhen the``pres"sure isfn reduced inthe Ychamberl 4 sofasto insure thef" openingjofthe exhaust ports. l

"The operation of the control A"Valve in con-v` nection with a pressure actuated;mechanism? is as follows z, the `charnber` isffconnectedfA inlet` 13.,isconnectedfthrough'a T 16ft0 the line z15; "The opening'14Holthe'member 2 isV normally open f to thefatmosphere "Fluid pressurev when" admitted tothe chamber 4* vmoves thejpi'stons 19a111fdv2`tclcse the ports u ,i

1n the exhaust ehainberand openthe Valve V6 i aiiewingfthe Huid under pressure@ the 'ieservoir tof* flow into the line 115k`andlfope'rate`A the mechanismg hen` the yalye Gf is open the l'ostpn` is; in;A a forward position? jiji the tliefv pistone 18 "l iduringli theiuidin `the operating lirie` is, "reduced fand i chamber:1f?V "from that shown'iii the draw'iiig,Y i,

andA the Lp'rlessure#in the ehamberff'bearson; i, l u

treffen "se i @innecesarias downwardly closing ,the valve ,6 and4 eutftirig som ,O'f pressure tol thefmechanism. ,""If the i lfluid pressure remaining'in theehaniber 4"isfl`e`ss thetensioii in "the spring" "24,1 the piston i: i

exhaust throughtheopeningsland 431 [to connection `ofutlrieiuihaust line;offtliemechaf n'ism` may l be" modified' y connecting to the of the exhausting'uidcouldbeiise y to assist in moying-'thevalye 23 to open? thefexhaust ports; `The relation fo-:t the siie1 of the pistoni` on theqyalve.stem12=to-the yalve seated in. i i the port14could beso `proportioned,that zal" suilicientfreduction in pressure 'ifthe oper#` ating: chamber 4' that' would'. "allowrthe" pis-r,

ino

ton of the valve 5 tomove downwardly and cut oli' pressure from the reservoir would not be great enough to cause the exhaust valve piston to move. The pressure in the body tilting cylinders could be held therein until such time as the pressure in the chamber 4 was further reduced to allow the exhaust chamber piston to move inwardly and open the exhaust outlet Aport 13.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

l. In a valve for controlling the supply of fluid pressure to a pressure actuated mechanism the combination of Va fluid distribution chamber in the casing of said valve, a fiuid exhaust chamber in a member mounted on said casing, a valve operating chamber in said casing, pistons mounted in said casing and member and seating against the pressure in said operating chamber, means mounted Vin said distribution and exhaust chamber, for regulating the flow of Huid therein and controlled by said pistons.

2. The combination, in a liuid pressure operated control valve casing, of a fluid distribution chamber, an operating chamber, a piston chamber containing a differential piston and connecting said distribution and operating chambers, means mounted in said distribution chamber and controlled by said piston for regulating the flow of fluid in said chamber, a-member mounted on said casing, an exhaust chamber and a piston chamber within said member, a piston in said member piston chamber and controlled from said( operating chamber, ports in said exhaust chamber and means in said exhaust chamber controlled by said memberpiston for opening and closing said ports, said pistonsV being actuatedby variations in the piston pressure in said distribution and operating chambers and resilient'means in saidmember resisting'movement, of its piston, in one direction. i

3. The combination, inaV fluid pressure operated control valve casing, of afluid distributionchamber, an operating pressure chamber, a piston chamber containinga differential piston and connecting said distribut-ion and operating chamber, means mounted in said distribution chamber androntrolled by said piston for regulatingthe flow of fluid in said chamber, a member mounted on said casing, an exhaust chamber'and a piston chamberwithin said member, a piston in said member pistonchamber and controlled fromA said operating chambenports in said exhaust chamber and means in said exhaust chamber controlled by said member piston for opening and closing said ports,

said pistons being 'actuated by variations in` the piston pressure in said distribution and operating chambers.

4. The combination with a pressure oper- Aerated control Avalve i casing,

ated control valve for selectively admitting pressure to a pressure actuated mechanism, of a member mounted on said casing and actuated by said pressure to prevent exhausting of the pressure from the mechanism when said control valve is open and to exhaust pressure from said mechanism when said control valve is closed and resilient means mounted in said member resisting the closing of the exhaustports/:of saidmember.

5. The combination in a lluid pressure opoffailuid distribution chamber, an operating chamber, a piston chamber containing a differential piston and connectingsaid distribution and operating chambers, means mounted in said distribution!chamber and controlledby said piston for regulating the flow of fluid in said chamber, a member mounted on said casing, an exhaust chamber and a piston'chamber within said member, a piston in said member piston `chamber and controlled from said operating chamber, ports in said exhaust chamber and means in said exhaust chamber controlled by said member piston for opening and closing said ports, said pistonsbeing actuated by variations inthe piston pressure in said distribution and operating chambers, said member piston being forced into exhaust position by exhausting pressure` in the exhaust chamber. y

In testimony whereof I aiiix my signature.

JOHN P. ANDERSON. 

